Signaling system



5 Sheets-sheet 1 Jan. l2, 1943. M. w. MUEHTER SIGNALING SYSTEM n FiledJuly 25, 1939 BY ATTORNEY Jan. l2, 1943. M, w. MUEHTER 2,308,198

S IGNALING SYSTEM Filed July 25, 1939 5 Sheets-Sheet 2 FIG. 2

INVENTOR M. W. MUEHTER BY M,

ATTORNEY Jan. 12, 1943. ,www1-:ATER 2,308g19s SIGNALING SYSTEM FiledJuly 25, 1939 5 Sheets-Sheet 3 T0 OTHER F a 3 INQUENGY MINUTE IMPINDICATORS CONTACT I DELINQUENCY INDICATORS*l INVENTOR M. W. MUEH TERBYfM' ATTORNEY Jan. l2, 1943. M. w. MUEHTER SIGNALING SYSTEM Filed Jgly25, 1939 5 Sheets-Sheet 4 INVENTOR M. W. MUEHT'ER BYV ATTORNEY Jan. 12,1943. g M, w MUEHATER 2,308,198

SIGNAL'ING SYSTEM y Filed'July 25, 1939 5 Sheets-Sheet 5 F`|G. 5 ."nr

INVENToR M. w. MUEHTER ATTORNEY Patented Jan. 12, 1943 UNITED STATESPATENT OFFICE SIGNALING SYSTEM Manfred W. Muehter, Nutley, N. J.,assigner to American District Telegraph Company, Jersey City, N. J., acorporation of New Jersey Application July 25, 1939, Serial No. 286,371

2.1 Claims.

This invention relates in general to signaling systems, but moreparticularly to a watchmans supervisory and signaling system wherein anumber of Watchmen are supervised by means of a plurality of box routesarranged either in one building or in several buildings. The boxes areoperated at regular intervals and in a given order to transmit signalsover a line extending to the central supervising office and it isnecessary that the watchman operate the boxes in succession to avoid adelinquency signal. This system further includes a means fornon-interfering and successive recording of the watchmans signals. Thesystem further includes a combination of means for transmitting andrecording emergency alarm signals or armed guard signals with a meansfor distinguishing between said signals, thereby affording the watchmanthe opportunity of summoning special aid in certain cases or unusualemergencies. The system also includes switching means for controllingthe time and sequence of operation of the watchmans boxes and fordisconnecting the delinquency indicator so that the boxes may beoperated in any order and within any time interval without causing adelinquency alarm.

The principal object of the invention is to provide a new and improvedapparatus for use as a watchmans supervisory and signaling system.

A further object is to provide a watchmans tour system wherein thesupervising oiiicer is enabled to supervise a large number of box tourswith a minimum amount of effort.

Another object of this invention is to provide a watchmans tour systemwherein the number of the last operated box is indicated by a stationindicator.

A further object of this invention is to provide a watchmans tour systemwherein report signals andv emergency call signals may be transmittedfrom the regular report boxes.

A still further object of this invention is to provide additional signalboxes in each tour circuit for the purpose of transmitting armed guardsignals which may summon aid of any desired kind.

Another object of this invention is to provide a watchmans tour circuitcapable of transmitting a plurality of types of signals, a means fordistinguishing said types of signals and a single recording means formaking a record of each individual signal.

Still another object of this inventionv is to provide a watchmans toursystem comprising aplurality of watchmans loops with a recording meansfor distinctively recording a plurality of different types ofidentification signals and the loop identication.

A further object of this invention is to provide switching means forpermitting the watchman to operate the tour boxes in random order andwithin any time interval.

Another object of this invention is to provide recording means forrecording certain or all of the watch report signals.

A still further object of this invention is to provide a watchmans toursystem wherein the emergency call signals and the armed guard signaismay be recorded in preference to the regular watch report signals.

Another object of this invention is to provide a watchmans toursupervisory system wherein actuation of the delinquency cut-off means,the sequence switching means or the emergency or armed guard alarm willcause the printing of a record o1" the particular element which has beenoperated.

Other objects and features of this invention will be apparent fromconsideration of the following detailed description taken in connectionwith the drawings wherein:

Fig. 1 shows the relation between the circuits illustrated in Figs. 2 to5.

Fig. 2 shows a circuit diagram of a watchmans loop circuit and apparatusfor controlling the station indicator.

Fig. 3 shows a circuit diagram of another portion of the controlapparatus associated with the loop circuit Fig. 4 shows a part of therecording control circuit and the loop selector.

Fig. 5 shows a circuit diagram of the recording apparatus common to allloops.

Fig. 6 shows an example of the recorder sheet used in the recorder shownin Fig. 5.

A brief general description ci the operation of the system and apparatusused in connection therewith will now be given, reference being had toFig. 1 of the drawings. The watchmans tour system is divided into aplurality of zones, each transmitting apparatus as that loop becomesactive for reporting a watch report signal. The transmitter is in turnconnected to a printer which records all signals received from each ofthe zones in non-interfering and successive fashf ion. The apparatuslocal to each zone is shown in Figs. 2 and 3 while the central ofceequipment, including the loop selector, transmitter and printer, isshown in Figs. 4 and 5.

When the watchman transmits his report signal, it is repeated andindicated on the station indicator which serves to designate the laststation operated on the route. The signals to be recorded aretransmitted from the station indicator through the printer controlapparatus to the loop selector at the central office. loop selector inturn causes the transmitting apparatus to control the printer forrecording the signals from each of the zones in the system.

The station indicator for one loop circuit and the printing apparatusfor all of the loop circuits wil be briey described. The watchmans watchreport transmitting stations, only three of which are shown, areconnected to the relay K shown in Fig. 2 and when the watchman operatesa transmitter to report to the central station, the repeating relay K isenergized. The transmitter has a number of teeth thereon correspondingto the number of the station plus two, the contact spring restingbetween the iirst two teeth. on a second round of the signal anddesignates an emergency signal While the second tooth sends a prefixsignal on the rst round of signals to indicate a watch report signal.The third tooth starts the station number. A more detailed descriptionof the signals will be given later. The prefix space timing relay Q issubsequently energized, acting on the rst impulse. During the subsequentspace between impulses relay K re- Thel the beginning and the end of thewatchmans tour. The printing operation is controlled by the recordingrelay Z shown in Fig. 3,.which is energized from the station indicatorST.

The system also provides a means for enabling the watchman to transmitan emergency signal which may be so designated on the recording tape.Ordinarily the watchmans station is operated by rotation of a key, buthe may transmit an emergency signal by opening the box and pulling itfor several rounds so that a prefix signal takes effect. The first roundof signals would operate the system in the normal manner describedabove, and the second round of signals will operate relays K, Q and V asbefore, but between the rst and second pulse, the relay Q will bereleased to prepare a circuit for emer- V. gency relay E. On the secondsignal impulse The first tooth is active onlil leases energizing relay Vwhile Q holds up since it is a slow-release relay. On the secondirnpulse, relays K and W are energized, also the selector switch S,which will be called the station selector. After the second impulse, Kreleases and the selector switch rotates one step but the other relaysmentioned above stay energized. During the following impulses K controlsthe selector to step the switches to temporarily register the box code.After the last impulse of the signal train, the second auxiliarycounting relay W releases to in turn step the station indicator selectorswitch ST. The station indicator operates an indicating device to showthe last watchmans station which has een operated. When relay Wreleased, the reset magnet iD-RS of the delinquency indicator shown inFig. 3 was also operated to reset the delinquency indicator and preventa delinquency alarm. After the release of relay W, relays V and Q alsorelease and the selector S is stepped back to its normal position whilethe station indicator remains in its last position.

If the watchman has not followed the proper sequence in operating histour of stations, or has failed to operate a box within a given timeinterval, the relay W is released so that the selector steps back totheV normal position without having energized the station indicator STor the delinquency indicator shown in Fig. 2. As a result a delinquencyalarm is actuated to warn the station operator that the watchman isfaill ing to operate his stations properly.

Figs. 4 and 5 show the printing apparatus which records the signals fromthe stationsat relay W is energized and relay V is deenergized duringthe following space. On the next pulse the station selector S isenergized and steps during the following space. At the end of the round,relay W releases to step the station indicator ST and energizes therelay E shown in Fig. 3 which in turn controls the recording of theemergency signal.

It is sometimes desirable to arrange the system so that the watchmanwill not be compelled to operate his stations in sequence or within agiven time interval, and therefore the sequence switch SQ is providedfor allowing the station indicator ST to operate and relay Z tobelenergized so that a, signal is always recorded regardless of thesequence of operation of the watchmans stations.

The operation of the printing apparatus will now be briefly described.As mentioned above transmission of the ordinary report signal energizesrelay Z while transmission of an emergency signal energizes relays Z andE. Assuming that the ordinary watch report signal is received by thestation indicator apparatus, relays Z, R and A are operated, relay Ashunting the relay R by the condenser kF so that the relay R is deenergized by A except for the charge on condenser F. Relay A operatesthe loop selector LS and also another selector SS. The loop se lectorselects the particular station indicator which has stored the watchreport signal and then the connection is extended through the relay Cwhich stops the loop selector. C locks and energizes relay U which alsolocks itself and the relay A. Relay U controls the transmittingselector, T, relay P sending stepping impulses to the magnets STI, ST2,ST3 and STA.

Every time relay P picks up, it releases selector T which in turn makesone step to thereby shunt relay P and deenergize it. On the next impulseP again energizes and steps the selector T. This continues vfor theduration of the printer stepping impulses. The number of impulsestransmitted to the magnets STI-li is controlled by relays J l-l` whichare energized to cut off the respective stepping circuits in accordancewith the signal to be recorded. The steppingmagnets are to position theproper type characters so that a recording may be made of thetransmitted code and the nature of the report and after the tenth stepof the transmitter T the printing magnet PR is energized to print arecord of the transmitted signal. After the tenth step of thetransmitter, a circuit is completed for shunting the relay Z and thetransmitter steps one more step to cause stepping of the printer paperand releasing of the magnet RL energized by the transmitter T. Theprinter wheels vare reset to the common position and relays A, U, C, Rand J I-4 are deenergized. The transmitter T is stepped back to normaland is ready for any other signal which may be stored in another stationindicator.

If an emergency signal is transmitted lfrom a watchmans station, relaysZ and E are energized to in turn energize the relays AP Vand AL. Therelay AP interrupts the starting circuit for all signals exceptemergency and armed guard signals so that there can be no delayedprinting of emergency or armed guard signals. As before, the relay Rstarts the transmitting equipment, controlling the printer wheels torecord the words emergency call. The remainder of the signal is recordedin the usual manner.

When the armed guard signal is received, relays E and Z are energized asbefore, the station indicator is stepped to a position causing theprinter wheelsto record the words armed guard call. If two or more callsare stored in the station indicators simultaneously the loop selectoracts to select each call separately and in the proper sequence.

If a watchman fails to operate his transmitter in the proper sequence,the apparatus at the central station is operated to cause a delinquencyalarm. In Fig. 3 a minute impulse contact energizes the delinquencyindicator D-AD once every minute and if the watchman fails to operatethe boxes in the required manner, the reset magnet of the delinquencyindicator will not be energized, the delinquency indicator being steppeduntil its alarm contacts are closed. Closing of the alarm contactsenergizes bus bar B-2 to start up the transmitter T as before to recorda signal on the printer. When the watchman operates the box which hefailed to operate in the normal manner the alarm relays are deenergized.The delinquency switch DS is provided for disabling the delinquencyalarm and when it is operated relays R and A are energized to start theselectors LS and SS. The transmitter T is started and relays J2 and J3position the printing wheels to cause recording of the words delinquencyindicator off.

Similarly when the sequence switch SQ is operated the words sequencecontrol are brought into position on the printer wheels.

In case of an emergency or armed guard signal the relay AL is energizedand locks in thereby giving a continuous audible and visible alarm whichcan only be silenced by the operator operating his acknowledgement keyACK. This energizes relay O to cause release of relay AL therebysilencing the alarm. At the same time relays R, A, C and U are energizedto in turn properlys control the relays J I, J2 and J4 for printing thewords supervisors acknowledgment.

'Ihe system having been described in general, a detailed descriptionthereof will new be given. The watchmans tour system comprises a numberof loop circuits disposed within a single building or within a number ofdifferent buildings, each loop including a number of tour boxes for thepurpose of supervising the watchmans route. In this manner a number ofwatchmen may b'e supervised from a central station and each watchman maybe compelled to cover a prescribed tour. Each tour box comprises atransmitting wheel such as that shown in station I at the top of Fig. 2of the drawings. It is to be noted that the transmitter wheel has aplurality of teeth thereon corresponding to the number of the stationplus 2 and it should be further noted that the pen spring normallyvrests between the r'st two teeth, the purpose of which will now bedescribed. When the wheel 3 is rotated in the direction of the arrow thepen spring is lifted away from the code Wheel by the teeth thereof totransmit two impulses by grounding the loop circuit. The rst impulse isa normal prex which designates that the signal transmitted is the normalwatch report signal, while the second impulse designates the number ofthe station which has been operated. The operation described aboveoccurs on the first round of the transmitter wheel, but if an emergencyoccurs the watchman may operate the transmitter wheel for a number ofrounds in which case during subsequent rounds the rst tooth on the wheel3 causes a marking impulse followed by an abnormally long space to betransmitted for the purpose of controlling the recording equipment torecord an emergency signal.

When a watch report signal is transmitted, the first tooth on the codewheel of station III, for instance, grounds the circuit for box relay Kfrom battery through the coil of relay K through the pen spring at boxIII to ground thereby transmitting the normal prex signal. Relay K isenergized and closes a circuit for space-timing relay Q from battery,through the 25th or normal bank contact of the second bank of selector Sthrough an obvious circuit to the coil of relay Q through contact 3 ofauxiliary counting relay W, make contact 3 of relay K which was closedwhen relay K was energized, contact 2 of auxiliary counting relay V andthrough the resistor I0 to ground. Relay Q pulls up and closes a holdingcircuit from its lower coil terminal to resistor I0 through its owncontact 2 thereby locking itself when the make contact 3 of relay Kopens. This last mentioned contact opens when relay K releases duringthe space following the first signal impulse. At the same time backcontact 3 of K closes and applies a shunt to relay Q which can be tracedfrom battery through the left hand normally closed contact of switch I5,back contact 3 of K and contact 3 of W to the lower terminal of coil Q,the upper terminal of which is also connected to battery through the25th contact of the second bank of selector S. The space betweenimpulses is not of sufficient duration to cause relay Q to release dueto the inductive effect of its coil.

At the same time, a circuit is closed for relay V from battery throughmake contact I of relay Q, back contact I of relay K, lower winding ofrelay V and resistor II to ground. Relay V pulls up and locks in throughits make contact I and back contact I of relay W to battery. Thus thenormal prefix signal is deleted. The 'second impulse received from thebox again operates relay K and closes a circuit for relay W which may betraced from battery through the left hand contact 5 of relay V, righthand contact of switch I5, make contact 2 of relay K, the coil of relayW and resistor I2 to ground. Relay W pulls up and locks in through itsmake contact I to battery. Thus the rst two impulses from the watchmansbox III have energized relays Q, V and W.

The locking circuit of relay V is changed at this time since the breakcontact I of relay W is now open, but this is ineffective since thiscontact is now bridged by the make contact I of relay K which is nowclosed. When relay W is operated, selector magnet S is energized througha. circuit which can be traced from battery through contact 3 of relayQ, make contact 4 of V, contact 4 ofK, and through 'the'coilS to ground.When relay K releases duringthe following impulse, the selector magnet Sis deenergized at contact II of relay K and its armature moves theassociated wipers of the selector one step forward to position l At thesame time the coil of relay W is shortcircuited by back contact 2 ofrelay K. The duration of the space between impulses, however, is notsulicient to cause relay W to drop. It will be noticed that the previouslocking circuit of the lower winding oi relay V is now open at contact Iof relay K but the relay stays operated since its original operatingcircuit is closed when back contact I of relay K =closes. The relay V ismaintained energized by the make-before-break contacts I of relay Kwhich are so arranged that one makes before the other breaks in ordernever to interrupt the continuity of the circuit through the lowerwinding of relay V. When the selector S was stepped forward to positionI the selector operated the cam I6 to in turn operate the switch I sothat the make contacts of switch I5 are no longer closed and the shuntcircuit of relay Q is therefore opened. The operating circuit of relay Qis likewise opened since the second wiper of selector S is not makingcontact with its th bank contact. However, this contact is bridged bythe right hand contact 5 of relay V so that relay Q remains energized.

The remaining impulses of the watch report signal from station numberIII will have no elect on relays Q, V and W since they all stay operatedbetween impulses and the selector S is stepped one step whenever relay Kreleases. It will thus be seen that the first impulse of the codedsignal is deleted as far as the selector S is concerned for a reasonwhich will become apparent later. The selector S is therefore moved onestep less than the number of imp-ulses received from the box whereby ifthe number of impulses received from the box is d, the selector S willbe in position 3 at the end of the signal impulses from the watchmansbox thereby temporarily registering the box number. After a short timeinterval; the shunt across relay W through back contact 2 of relay Kwill become effective and cause relay W to release its armature. If thebox has been operated according to schedule, the station indicator STwill at this time be in position number 2, which means that the boxoperated before was box number 2.

When relay W releases, a circuit is :closed from battery through contact3 of the second wiper and bank of selector S, back contact 4 of relay W,make contact 3 of relay V, the third contact and wiper of the first bankof selector S, the second contact and wiper of the iirst bank of stationindicator selector ST, conductor IIIiI to contact 2 of relay Z shown inFig. 3, conductor IDI, interrupter contact of the station indicator ST,and the coil of ST to ground. The station indicator ST will operatethrough this circuit in self-interrupting fashion. In other words relayW identies the termination of the code and controls the start ofsubsequent operations.

At the time of release of relay W, the reset magnet D-RS of thedelinquency indicator D, shown in Fig. 3, is energized through aparallel circuit which branches off from conductor Iiiil through thenormally closed contact I of switch DS and winding D-RS to ground. Thesecircuits are obviously interrupted as soon as the wipers of ST leaveposition 2, ,therebycausing the indicator ST to stop in position 3 topermanently register the box number and indicate that station number IIIis the last station which has been operated.

When relay W releases, a shunt is applied to the lower winding of relayV which can be traced from battery through the normally open contact ofswitch I5 which is now closed, contact 2 of W to the upper terminal ofthe winding of relay V, the lower terminal of which is also connected tobattery. Consequently this relay will be slowly de-energized and releaseits armature. It will be noted that the upper winding of relay V, whichis connected in multiple with the coil of interrupter contact of stationindicator ST, is also deprived of current when the operating circuit ofmagnet ST is opened.

Relay V havingreleased, relay Q is also de-energized by the opening ofright hand contact 5 of V and at the same time a circuit is closed forselector S from battery through the second bank and wiper of S, backcontact 4 of W, back contact of 3 of V, interrupter contact of S of thecoil S to ground. Therefore selector S will operate through the abovecircuit breaking its own current until it reaches the normal position 25at which time the wiper of the second bank opens the circuit permanentlyand S is again in its home position. In other words, relay V determinesthe instant at which selector S returns to its home position.

In case the watch-man should not operate the boxes successively andwithin the allowed time period and should pull box number 5 when he wassupposed to pull box number II, the'station indicator being in position3, there will be no circuit closed for either the station indicatororrthe reset magnet of the delinquency indicator when relay W isreleased at the end of the report signal. When relay W releases, relay Vwill drop out after a short delay due to the shunt across its lowerwinding and selector S will be reset to the home position as explainedabove. The box signal will therefore fail to step the station indicatorand the delinquency indicator thereby causing a delinquency alarm. Thedelinquency indicators may be of the types shown in the ypatents to R.M. Hopkins, Nos. 1,942,814 and 1,942,815 of January 9, 1934.

If the boxV happens to be the first or last on the route and is operatedaccording to schedule, its signal will not only cause resettingY of thedelinquency indicator and operation of the station indicator but willalso cause recording of the signal on the printing recorder. Assumingthe last box'number on the route to be II, the selector S will bestepped up to position I'I in the manner explained above and, when relayW releases at the end of the report signal, a circuit is closed tact ofrelay Z, conductor II, interrupter contact and coil of ST to ground. STwill again operate, breaking its own circuit for several steps sincebank contacts Iii to 24 of bank I of ST are strapped together and willcome to a stop in position 25. The.' reset magnet D-RS will be enersizedat the same time as described above. The

upper winding of relay V is simultaneously held energized through aparallel circuit branching off wire IEII to prevent this relay fromreleasing' prematurely. When the wipers of ST reach position 25, acircuit is closed from the 17th bank contact of bank I of selector Sthrough the th bank contact of bank 2 of station indicator ST, the 17thcontact of the third bank and wiper of selector S, conductor |02,through back contact I of relay Z, the series resistance 2Q and relay Zto ground. Relay Z operates and locks in through its make contact Ithereby causing the signal to be recorded on the printing recorder, aswill be explained in detail later.

Boa: signal recording-Relay Z is also operated uopn reception of areport signal from box I as its circuit is closed in position I ofselector S through a circuit which may be traced from battery throughthe rst contact andwiper of the second bank of selector S, ba-ck contactsi of relay W, make contact 3 of relay V, the first contact and wiper ofthe first bank of selector S through the wiper of the second bankofstation indicator ST, in position I, the rst contact and wiper of bank 3of selector S, conductor I, the rst back contact of relay Z, resistor 26and the coil of relay Z to ground. Again the signal is recorded on theprinting recorder as in the case of the last boX on the route. If thenumber of boxeson'a circuit exceeds III, one or more intermediate boxesare also arranged to record their signals on the printer, correspondingbank contacts of bank 3 of selector S being multipled.

Ordinarily the watchman may transmit his usual Watch report signal bythe insertion of his key in the watch report box but under certaincircumstances he may desire to transmit an emergency call signalwhereupon by opening the box and pulling it for several rounds he maytransmit an emergency call signal which is recorded as such. When thewatch box isoperated by pulling the lever for several rounds, a prefix Iis brought into play for rounds following the first so that the singlegroup of impulses ordinarily transmitted by the watch station will bepreceded by a single impulse followed by an abnormally long space. Theimpulse wheel is cut in such a manner that a space approximately threetimes the length of the space between the regular teeth occurs betweenthe prefix tooth and the first tooth of the regular transmitting teeth.Therefore there will be a longer space between the first impulse whichis the prex impulse and the following signal transmitting teeth.Assuming the box number to be III, the first rourd of signals willconsist of four'impuls-es and' will operate the apparatus exactly asexplained above.

If the watchman is not scheduled to pull the particular box, it willhave no permanent effect upon the apparatus at the control center butwhen the first impulse of the following round is received the operationwill be quite different. Prefix space timing relay Q is energized asdescribed above when K is rst energized and during the following space,K releases and energize-s V likewise as before. However, since thisspace is of longer duration due to the spacing of the teeth on thetransmitter wheel, the shunt across relay Q from plus through the lefthand normally closed contact of switch I5, back contact 3 of relay K,and contact 3 of relay W to the lower side of relay Q, becomes effectiveand relay releases after a certain delay. Back contact I of Q closingshunts the lower winding of relay V through back contact Iof K, backcontact I of Q, contact E of W to the upper terminal of the lowerwinding of relay V, but the space between the prefix and. the box codeis not of sufficient duration to cause relay V to release.

his.

When the next impulse is received, which is the first impulse of the boxcode, relay W is energized in the same manner as before, from batterythrough the left hand contact 5 of V, right hand contact of switch I5,make contact 2 of K, the coil of relay W and the resistor I 2 to ground.During the following space, relay V is deenergized because the formeroperating circuit through make contact I of relay Q is no longer closedand make contact I of K and back contact I of W are both open. When thenext impulse is received, a circuit is closed for selector S frombattery through contact 5 of relay W, back contact 4 of relay V, contacti of relay K of the stepping coil of selector S to ground. During thefollowing space between signal impulses, selector S is stepped forwardone step to position I and at this time relay V is reenergized frombattery through the normally open contact of switch I5 which closed whenthe selector S was stepped forward, back contact I of relay Q, the lowerwinding of relay V and resistor I I to ground. Relay V closes a lockingcircuit for itself through its Contact I and make contact I of K, whichis effective during impulses. The following impulses again operateselector S through a different circuit which can be traced from batterythrough the second bank and wiper of selector S, make contact 4 of relayW and make contact 4 of relay K. Selector S is thus moved three stepssince four impulses are transmitted by the box in addition to the prefiximpulse and selector S temporarily registers the box code as in the caseof a watch report signal.

The emergency prefix impulse and the normal prefix impulse of thefollowing four are deleted as far as selector S is concerned, the reasonbeing that the first impulse received may be the emergency prefiximpulse and in that case is additional to the impulses representing thestation number and it is therefore deleted in all cases. This means thatthe normal station signal which is transmitted by the box must consistof one impulse more than is necessary to indicate the number of the box.If the first impulse received is actually the emergency prefix impulse,it is followed by a longer space as described above and in that case thefirst impulse of the following normal station signal is also deleted, aswill be evident from the above description Aand therefore the selector Sis always moved the same number of steps whether the emergency prefiximpulse is received or not.

As explained above in connection with reception of the ordinary nightwatch report signals, relays V and W stay energized as long as theimpulses are coming in, the only difference for emergency signals beingthat the circuit for the lower winding of relay V is closed during spaceintervals from battery through the make contact of switch I5, backcontact I of relay Q and back contact I of relay K instead of frombattery through make contact I of Q and break contact I of K aspreviously. At the end of the emergency call signal, relay W releasesdue to the shunt through back contact 2 of relay K and a circuit is nowclosed from battery through the second bank and wiper of selector S,back contact 4 of relay W, make contact 3 of relay V, back contact I ofrelay Q which is open for ordinary night watch signals, conductor ISB tothe lower winding of emergency relay E and ground thereby energizingrelay E. Energization of emergency relay E closes a circuit from batterythrough bank 2 of selector S, back contact 4 of relay W, make contact 3of relay V, conductor I04, make contact 4 of relay E, contact 2 of relayZ, conductor IUI, the interrupter contact and the coil of stationindicator ST to ground so that ST will operate even though it has notbeen in the proper position with respect to the box signal received.Assuming the box number to be III station indicator ST will operate inself-interrupted drive until it reaches position 3. At the same time thereset magnet of the delinquency indicator is energized as explainedbefore and likewise the upper winding of relay V in order to preventthis relay from releasing prematurely. When station indicator ST reachesposition 3 a circuit is closed from battery at the wiper associated withbank 2 of the switch S through the third bank contact of bank I ofselector S, the third bank contact of bank 2 of station indicator ST,conductor |05, contact I of emergency recording relay E, resistor 20 andthe coil lof recording relay Z to ground, thereby operating relay Z andstopping station indicator ST by breaking contact 2. Relay Z locks inthrough make contact I which also locks in relay E through contact 2 ofrelay E and the upper winding thereof, thus causing an emergency signalto berecorded on the printing recorder, as will be describe-d later. Ashort time after operation of relay Z, relay V releases and resetsselector S to the-home position to be ready for the next round, asexplained above.

The system also includes armed guard boxes which are connected in eachof the loop circuits for the purpose of summoning assistance, thedistinction being that in this box the pen spring is so arranged inrelation to the code wheel that the prex I is transmitted even when asingle round is transmitted and, in addition to the distinctive numberassigned to the box, which is larger than any number assigned to aregular box-the recording on the printer is also distinctive due to thedesignation armed guard call on the tape. The distinctivecharacteristics of the printing operation will be explained in detaillater on. Y

Another feature of this invention is the provision of a sequence controlswitch SQ, Fig. 3, which isprovided for each of the station indicatorunits for the purpose ofV arranging the system so that night watch boxeson a particular route can be'pulled in any sequence and every incomingrej port-signal will reset the delinquency indicator to prevent adelinquency alarm. When the switch SQ is thrown, it will permit theoperation of the station indicator for all signals regardless of se--ple with bank 3' of selector S through wires |02 and |65, therebycausing the watch report signalto be recorded on the printing recorder.

Another switch Ds, shown in Fig. 3, of the drawings, serves todisconnect the delinquency indicator, as will be described later. Arecording is made when the position of either switch DS or SQ is changedas will also be explained below.

All phases of operation of the system have been described up to andincluding the operation N of recording relay Z which controls theprinter, shown in Figs. 4 Iand 5, for printing the watchmans toursignals of various characteristics. As described above, the signals fromthe watchmans loop control selector S and station indicator ST tothereby control the delinquency indicator and relay Z and, inemergencies, relay E. Iny a case Where 'a station signal is to berecorded on the printing recorder, recording relay Z is operated and ifthe signal happens to be an emergency signal, emergency recording relayE is also operated. I

Assuming the signal to be the usual watchmans report signal, theoperation of relay Z closes a circuit shown in Figs. 3 and 4 which canbe traced from battery through contact 5 of relay C shown in Fig. 4,contact I of relay AP in the transmitter unit, busbar B5, through backcontact 6 of relay E of the particular station indicator unit which hasbeen operated by-thewatchmans loop connected therewith, contact 3 ofrelay Z, resistor 24, busbar B2, back contact4 5 of auxiliary startingrelay A, contact 4 of relay C and the coil of main starting relay R toground. Relay R operates, closing the circuit for relay A from groundthrough contact I of relay P shown in Fig. 5, conductor 40|, makecontact of relay R, resistor 26 and the coil of relay A, throughresistor 28 to plus. Relay A energizes and operates to close makecontact 4 thereby connecting the coil of relay R in multiple with acondenser F which previously had been charged through a circuitextending from battery through back contact A of relay A, resistor 50,condenser F and ground. Shortly after closing of front contact 4 ofrelay A, the former operating circuit of relay R is opened at backcontact 5 of relay'A.A VRelay R is now dependent on the charge ofcondenser F for holding up its armature, the purpose of this circuitbeing to cause release of relay R after a short time in case thestarting circuit should be opened again before selecting operations havebeen completed. i

. When relay A closes its contact 3, a circuit is completed for the loopselector LS from battery through contact 3 of relay A, back contact 2 ofrelay C, and the interrupter contact and coil of loop selector LS toground, selector LS operating through this circuit inV self-interrupteddrive. Another selector SS operates in a multiple circuit which can betraced from back contact 2 of C through the break contact of stop relayB, interrupter contact and coil ofA selector SS to ground. The operationof' this second selector has no part in the operation of the circuit atthis time and will be described later on. Selector LS moves its wipersstep by step until its first wiper reaches a point where a circuit isclosed from battery through contact 5 of relay C, contact I of relay AP,over busbar B5, back contact 6 of relay E, contact 3 of relay Z, toconductor 20| of the particular station indicator unit. Conductor 20| isconnected to contact 2 of bank of selector LS. From this point thecircuit is completed through the wiper of bank I of selector VLS throughthe left hand winding of stop relay C, contact of relay A to backcontact 2 of relay U to ground. Therefore relay C operates and breaksthe operating circuit of loop selector LS and selector SS by opening theback contact 2 when the proper station indicator is found.

Energization of relay C closes a holding circuit which may be tracedfrom battery through contact 3 of relay A, make contact 2 of relay C,through the right hand winding of relay C to ground. Contact 5 of relayC opens and substitutes right hand winding of start relay U for contact5 in the former operating circuit of the left hand Winding of relay C,while this vwinding is short-circuited by contact I of relay C. Relay Uenergizes and looks in from ground throughY its make contact 2, the lefthand winding of relay U, through contact 3 of relay A to battery. Makecontact I of relay U closes and locks in relay A so as to make itindependent of relay R and its condenser F for holding the armatureenergized during the remainder of the operation.

Energization of relay U starts the operation of transmitting selector Tshown in Fig. 5. Selector T in conjunction with relay P sends irnpulsesto the four stepping magnets STI to ST4 of the printer to set up thetypewheels in the proper position for printing the transmitted signal.The printer may be of the type shown and described in applicants priorPatent No. 2,126,025

issued August 9, 1938. When the upper make contact 4 of relay U closes,the transmitting selector T is energized from battery through upper makecontact 4, conductor 30I, bank contact 25 or bank contact I2 of bank 2,either of which is printer through the back contacts of the assoi ciatedJ relays, through busbar BL and the lower contact 4 of relay U tobattery, thereby causing the ST relays to move their ratchet wheels onestep. When relay P operates, contact 3 of relay P opens and selector Treleases but relay P does not drop out when the make contact of T breakssince it stays energized through the resistor 32 and the coil oftransmitter selector T in series. This holding current is too low toaffect the magnet of selector T and when the armature of selector magnetT has completed its back stroke, moving the wipers forward one step, theback contact of selector T closes thereby shunting out the coil of relayP which causes the armature to drop out with a slight delay. Thisassures positive operation of the transmitting selector T as well assufricient duration of the impulse for the printer stepping magnets.When contact 3 of relay P closes again, the magnet T is reenergized fora new cycle. For this step and those following the circuit may be tracedfrom battery through the second bank and wiper of selector T in serieswith contact 3 of relay P.

Let it be assumed that watch box I4 of the first watch route has beenoperated for a watch report signal and that relay Z in the correspondingstation indicating unit has been energized in accordance with the abovedescription. As also eX- plained above the relay Z controls the relay Pand transmitting selector T of Fig. 5. When relay P releases after thetransmitter T has moved its wipers for the iirst step, a circuit isclosed for relay J I which can be traced from ground through backcontact 2 of relay P, the left hand winding of relay JI, conductor 404,through the wiper and bank Contact 2 of bank 3 of loop selector LS tocode bus bar I which is connected in Fig. 4 through the rst andthirteenth bank contact of bank I of selector T. As the wipers ofselector T are now resting on the iirst or thirteenth bank contact,depending on whether they started from the twenty-fth or twelfthposition, the circuit is completed to battery. Relay J l is thereforeenergized and in opening its back contact prevents further impulses fromreaching the stepping magnet STI of the printer. Relay J I is locked inthrough its make contact and right hand winding to battery on bus bar BLwhich is connected through the lower contact 4 of relay U.

Another circuit is simultaneously closed from ground through backcontact 2 of P, the left hand winding of J3, conductor 403, wiper andcontact 2 oi bank 5 of selector LS, conductor 302 to bank 4 of thestation indicator selector ST which is connected to the rst watch route.Since this wiper is now in position I4 the circuit is completed throughbank contact I'4 of bank 4 to bus bar I where battery is now availablefrom bank 2 of selector T. Relay J3 is therefore operated and by openingits back contact prevents further impulses from going to the thirdprinter stepping magnet ST3. At the same time it closes a holdingcircuit through its make contact and its right hand winding through thesame circuit mentioned above in connection with relay JI. After thesecond step of selector T, another circuit is closed for relay J 2 whenrelay P releases, the circuit extending from ground through back Contact2 of relay P, through the left hand winding of J2, conductor 445,through the wiper of bank 4 of loop selector LS, bank contact 2 of bank4, conductor 303 to bank 3 of the station indicator ST, contact I4 ofstation indicator ST, conductor IE6, back contact 5 of relay E to thecode bus bar 2. From this bus bar a connection is made to the second andfourteenth bank contact of bank I of selector T on one of whichcontacts-the wipers of this selector are now resting, the circuitthereby being completed to battery. Relay J2 operates and opens its backcontact thereby breaking the circuit of the second printer steppingmagnet ST2 and locking in through its right han-d winding and its makeContact through the same circuit as traced above for releasing J I and J3. The following impulses will now operate only the fourth steppingmagnet of the printer and when relay P releases after the fourth impulsea circuit is closed for relay J4 from ground through back contact 2 ofrelay P through the left hand winding of relay J4 over conductor 405,through bank 6 of loop selector LS. This wiper is now resting on bankcontact Z'which is connected through conductor 304 to the wiper of bank5 of station indicator ST. This wiper is resting on its fourteenth bankcontact from which a connection is made to code bus bar 4 which is inturn connected to bank contacts 4 and I5 of bank i of transmitter T onone of which contacts the wiper is resting at this time therebycompleting the circuit to battery. Rel-ay J4 operates, breaks thecircuit of the fourth stepping magnet ST4 of the printer and locks inthrough its right hand winding and its make contact as in the case ofthe other J relays. The following impulses can have no eifect on theprinter since the circuits have all been broken to the ST magnets andwhen relay P releases after the tenth step of transmitter T, a circuitis closed from ground through back contact 2 of relay P, printer magnetPR, the tenth or twenty-second Contact of bank I of transmitter T t0battery. The printer magnet attracts its armature and records thesignals set up by the stepping magnets STI to ST4 on the tape which willbe zone I, watch station I4. The date and time is also printed alongsideof the signal recorded by the printer. Selector T stops at this timesince its former operating circuit through its bank 2 directly tobattery is no longer closed because the tenth or twenty-second rcontactsare connected through the make conof the station. The table furtherindicates the exact information'printed on any particular step of eachprinter wheel.

ist Wheel 2nd wheel 3rd wheel 4th wheel Armd. guard call Watch stationEmergency call Sequence control Watch del. after. Supvrs delinq. Delinq. indicator Supvrs. ack Tamper signal Zone l Zone 2 Zone 3 Ummmonda-Cambiano# When the wipers of transmitter T are in position I0 or 22respectively, another circuit is closed which can be traced from groundthrough back contact 3 of relay X shown in Fig. 3, conductor SGS,through the tenth or twenty-second bank Contact and wiper 4 oftransmitter T, wiper of bank 3 of transmitter T which is also on itstenth ortwenty-second bank contact, conductor 401 to the wiper of bank 2of loop selector LS, this wiperV being on bank contact 2, conductor 366and the right hand coil terminal of the relay Z of the station indicatorconnected to the first watchmans route. Since the other side of the coilof relay Z is also connectedto ground, the above traced circuit appliesa shunt to relay Z causing it to release its armature.

The transmitter T advances to position II or 23 respectively and in caseof position 23 will step forward to position 24 since coil T isenergized through bank 2 by an obvious circuit. The printing magnet PRisV released when back contact 2 of relay P breaks prior to the movingof the wiper arms and the paper is moved forward one step at this timeas explained in the patent to M W. Muehter No. 2,126,025, isued August9, 1938. When the wipers of transmitter T have stepped to the 11th or24th contacts a circuit is closed from battery through the wiper of bankI and its 11th or 24th contact through the break contact of printermagnet PR, the coil of release magnet RL and back contact 2 of relay Pto ground. The release magnet resets all typewheels to their normalposition and closes the back contact of a latch switch L which wasopened on the rst step of the stepping magnets STI-4 as shown in theabove identied Muehter patent.

At the same time relay A of Fig. 4 is shunted through a circuit whichcan be traced from the left hand coil terminal of relay A, conductor408, the 11th or 24th bank contacts of the fourth and third banks ofselector T in series, conductor 409 and the right hand terminal of coilA. Relay A releases, thereby causing C and U to release when contact 3of relay A opens their locking circuits. It should be noted that theformer operating circuit of the left hand winding of relay C has alreadybeen opened when relay Z deenergized and opened its contact 3. TheWinding of relay R is restored to its normal operating circuit which isalso opened at contact 3 of relay Z. Lower contact l of relay Udeenergizes relays JI to 4 when relay U is deenergized.

In View of the above circuit changes a circuit is now closed from thebattery through the back contact L of the printer, conductor IHS,contact 5 of U which closed when relay U was deenergized, conductor 4H,the eleventh or twenty-fourth contact of bank 2 of transmitter T, thewiper of bank 2, contact 3 of relay P and the coil of selector T toground, causing the selector T to move its wipers to positions 12 or 25respectively, which positions are the normal ones.

If another Watch report signal from a diierent zone or watch route hasbeen stored on the respective station indicators and is waiting to berecorded, the loop selector LS under the control of relay Z in theproper zone equipment will now connect the transmitting equipment ofFigs. -i and 5 to that particular station indicating unit through thecable and wires extending upwardly inthe upper left hand corner of Fig.4 and the transmitter will operate the recorder in a similar manner tothat described above. It will be noted that in the case of a dilerentzone, the bank contact of bank 3 of selector LS which is assigned tothat zone, is connected to the corresponding code bus bar so that thesecond contact of selector LS is connected to bus bar I whereby thestation indicator in the rst zone would cause zone l tobe recorded. Inthe case of zone 2, the fourth contact ofA bank 3 of selector LS isconnected to bus bar 2 so that the station indicator of zone 2 willcause the printing of zone 2. Thus the particular bus barV determinestheY number of impulses Which the first stepping magnet STI is toreceive which in turn determines the zone number to be recorded on thetape. The number of the box which is printed on the tape is determinedby the position of the corresponding station indicator ST and theinterconnection between the bank contacts of the fourth and fth banks ofthe station indicator ST to the code bus bars. As the loop selector LScan only connect to one station indicator unit at one time, the signalswill be recorded without interference and successively from each zone.

In the case where an emergency signal is to be recorded, relay Z isoperated in the usual fashion and relay E is also energized in theparticular station indicator unit. Relay E, by closing its contact 3,completes a circuit from battery through bus bar BIS, the coil of relayAP to ground and also the lower winding of relay AL to ground therebyenergizing both relay AL and AP. When relay AL energizes a lockingcircuit is closed from battery through back contact I of relay O,contact I of relay AL, its upper winding and ground. An obvious circuitis also closed for the special attention light Ail and bell SEI. Withrelay AP energized its back contacts open to interrupt the startingcircuit for the recording of any but emergency and armedY guard callsignals, in order to give preference to these and allow them to berecorded first. The back contact of relay AP removes battery from busbars B5 and B6, thereby interrupting the startingv circuit for recordingthe other signals. The

starting circuit for the recording of the emergency signal underconsideration is completed from battery through contact of relay C inFig. 4, bus bar B4, make contact 6 of relay E of the particularindicator unit, through contact 3 of relay Z in the same unit, resistor24, bus bar B2, back contact 5 of relay A in Fig. 4, back contact 4 ofrelay C and the coil of relay R to ground. Relay R starts thetransmitting equipment in Fig. 5 and operates the recorder in exactlythe same manner as previously explained in connection with the usualwatch report signals except that relay J2 is operated at a diierent timeas will be explained below. The circuit for relay J2 at this time isclosed when relay P releases after the third impulse to the printerstepping magnets through a circuit which can be traced from groundthrough back contact 2 of relay P, left hand winding of relay J2,conductor 405 to the wiper 4 in bank 4 of selector LS, bank contact 2Which is connected through conductor 303 to bank 3 of station indicatorST. From there the circuit extends over bank contact I4, assuming thatbox I4 has been operated, conductor |06, make contact 5 of relay E tocode bus bar 3 which is connected to bank contacts 3 and I5 of the rstbank of printer T on one of which the Wiper is resting at this time.This causes the line of type emergency call to be brought into printingposition instead of Watch station as in the previous case. When relay Zreleases, relay E also releases since make contact I of Z opens thelocking circuit of the upper winding of relay E. The remainder of therestoration of the apparatus to normal is the same as describedpreviously in connection with recording of regular watch report signals.

In the case of armed guard signals, relay E is again energized and theoperation will be the same as explained above for emergency call signalsexcept that relay J2 will be operated after the first impulse to thestepping magnets of the printer. This circuit can be traced through thesame relays and conductors as just described in connection withemergency signals except that from conductor 303 the circuit extendsthrough the third wiper and bank of station indicator ST directly tocode bus bar I since the bank contacts of the third bank of selector STwhich are assigned to armed guard stations are connected directly tothat bus bar, namely contacts I8 to 2l. All armed guard. stations havespecial numbers assigned to them so that their operation steps thestation indicator to these contacts. Bus bar I is connected to bankcontacts I and I3 of bank I of selector T, one of which contacts isclosed after the first step to complete the circuit to battery. Asmentioned above, relay J2 will be operated after the rst impulse to thestepping magnets of the printer and the line of type armed guard callwill be stepped up into printing position and record accordingly on thetape.

If emergency or armed guard signals are coming in on different loops atthe same time, selector LS will connect with the next indicator unitafter recording the first round of the rst signal and go on takingsignals from each indicating unit in succession. As the emergency callsignals are multi-round signals, the same signal will be recordedseveral times on the tape. In case of emergency and armed guard signalscoming in on several loops simultaneously, it might happen that selectorLS would not return to the first indicator unit in time for recordingthe second round before the third signal round on that circuit has comein. However, this has no harmful effect except that one round of the boxwill be lost. Under these circumstances when relay W releases after thereception of a box signal, relays Z and E are still energized, since theprevious round has not yet been recorded. Contact 2 of Z being open, thecircuit for station indicator ST and the upper winding of relay V isobviously open and relay V releases after a short interval due to theshunt applied to its lower winding through break contact I of K, backcontact I of Q and contact 2 of relay W. When relay V releases, thecircuit is closed for selector S as described above through which itoperates in self -interrupted drive, thereby bringing its wipers back tothe home position, so that the indicator equipment will be ready forreception of the following round.

As described before in the general description of this invention, adelinquency indicator is provided in each station indicator unit forsounding a delinquency alarm in the event that the Watchman fails tooperate the boxes in the proper sequence Within the given time period.The delinquency indicator shown in Fig. 3 receives ground impulses everyminute through the minute impulse contact, which is controlled by aclock circuit, through the coil of the delinquency indicator advancemagnet D-AD, through contact 2 of switch DS and back contact 2 of relayDA to battery. Thus the delinquency indicator is periodically steppedthrough a series of steps to time the period between Watch boxoperations. If the Watchman fails to operate his boxes accordong toschedule, the reset magnet of the delinquency indicator will not beenergized and the delinquency indicator Will continue to be steppedforward until its alarm contacts operated by a cam on the steppingmechanism close. This completes a circuit which can be traced frombattery through contact 6 of relay C, contact 2 of relay AP, bus bar B6,left hand contact I of the delinquency indicator, Contact I of relay D-Athrough the resistor 25 to bus bar B2, thereby starting the transmitterT by operating relay R as explained above in connection with therecording operation. The signal will now be recorded on the printer andthe operation is the same as explained above for night Watch signals,except that selector LS comes to a stop in position 3 because ofconnection to contact I of D-A. 1 When relay C operates, the right handwinding of relay X is inserted in the operating circuit oi the left handwinding of relay C. Relay X operates and locks in from ground throughits lower contact 2, its left hand coil and through contact 3 of relay Ato battery. The upper contact 2 of relay X energizes relay U through anobvious circuit and the operation of the printer is similar to thatexplained above, except that the relay J2 operates after ve impulses aswiper 4 of LS is resting on bank contact 3 making connection to bus bar5, bringing the line of type delinquency after into printing position.The complete recording Would be for instance zone 1," deliinquencyafter, and the number of the lastoperated box. When transmitter Treaches its position 10 or 22 respectively, a circuit is closed frombattery through make contact 3 of relay X, conductor 305, the tenth ortwenty-second bank contact of the fourth and third bank of selector Tand the associated wipers in series, conductor A31, through the secondwiper and bank of loop selector LS in position 3, conductor 301 to theproper station indicator unit, the coil of relay D*A, bus bar B and coilof relay D-AL shown in Fig. 5 to ground. Relays D-A and D-AL operate inseries, relay D-A closing a locking circuit through'the right hand alarmcontact of the delinquency indicator and through its lower make contact2 to battery, this circuit also lockt Yneglected to pull at the propertime, the delinquency indicator resets and its alarm contacts open,relays DA and 4D-AL become deenergizedV as described above in connectionwith reception of night watch signals. It is also possible to silencethe audible delinquency alarm by turning the corresponding delinquencyindicator oi by means of the switch DS shown in Fig. 3. When this switchis operated, a circuit is closed for the reset magnet of the delinquencyindicator which can be traced from ground through the coil of the resetmagnet D-RS, the make contact I of switch DS to contact 3 of relay DS-Aand make contact 2 of relay D-A to battery. The delinquency indicator isthereby reset and D-A and DAL are deenergized as mentioned above. Whencontact 2 of switch DS opens, further minute impulses are prevented fromenergizing the particular delinquency indicator magnet D-AD.

When the delinquency switch DS is thrown, the operation is recorded onthe recorder through operation of the circuit which will be describedbelow. At the same time the switch DS is thrown, a circuit is closedfrom battery through contact of relay C, contact 2 of relay AP, bus barBt, contact 3 of switch DS, back contact I of relay DS-A, resistor 23,bus bar B2, contact 5 0f relay A, Contact s of relay C and the coilPreventing repetition of the recording operation.

of relay R to ground, thereby causing relay R to operate. Relay Aoperates as described and selectors SS and GS start to run. AWhen therst wiper of selector SS reaches the point which is connected to theparticular station indicator unit of zone I, for example, a circuit isclosed from battery through the start circuit just mentioned above, backcontact I of relay DS-A, conductor 358, bank contact 2 of the first bankof selector SS, the Wiper of this bank, contact 2 of relay A, the coilof relay B and back contact 3 of relay obvious circuit and start thetransmitter T. The number of impulses 'transmitted to the rst printerwheel is again controlled through the third bank of loop selector LS buta connection is kmade from bank contact i where the wipers of JselectorLS are now resting to the wiper 3 of made between the contacts of thefourth bank of selector SS to the code bus 1oars which extend thecircuit from code bus bar 'l through bank 4 of selector SS, bank contactI and the fourth wiper of loop selector LS, conductor tothe left handwinding of relay J2, thereby bringing the line of type delinquencyindicator into the printing position. Relay J 3 is energized after thefourth step of transmitter T through a circuit C to ground. Relay Boperates and by opening its contacts interrupts the operating circuit ofselector SS but selector LS continues to operate. When the wiper of bankI of selector LS reaches its first contact, a branch circuit is closedfrom the rst wiper of selector SS to the rst bank contact in bank i ofselector LS, through its wiper and the left hand winding of relay C,contact l of relay A and back contact 2 of relay U to ground. Relay Coperates and stops the selector LS locking itself as described above andalso inserting the right hand winding of relay X into the formeroperating circuit of the left hand winding of relay C as describedpreviously. Relay X operates to energize relay U through an which can betraced from ground, through back contact 2 of relay P, left hand windingoirelay J3, conductor 433, contact i of Yrelay X, con- Aductor M3, bankcontacts G or I5 of the third and fourth banks and associated wipers ofVselector T in series to battery. The third typewheel is thereforepositioned to print oi Relay Jd will energize through conductor 433 whenrelay U pulls up since bank Contact I of bank 6 of loop selector LS isconnected through the blank bus BL and the lower contact 4 of relay U tobattery. Therefore, no indication will be printed in the fourth column.When selector T reaches position l0 or 22 respectively, a circuit isclosed from battery through make contact 3 of relay X over conductor333, through the tenth or twenty-second bank contact of the fourth bankof transmitter T. conductor 431, through the second Wiper and bankcontact I of selector LS, the second wiper of switch SS and its secondbank contact, conductor 339 and the coil of relay DS-A to ground. RelayDS-A then energizes and locks in through the upper half of its windingin series with its own contact 2 to battery. Back contact I` of relayDS-A opens and interrupts the former starting circuit for relay R,

A similar recording operation takes place when the sequence controlswitch SQ is operated. The

printing wheels will be positioned to print the words sequence controloff. When either of the control switches is returned to their normalposition for instance, DS, a circuit can be traced from battery throughcontact 5 of relay C, contact. I of relay AP, bus bar B5, Contact 4 ofswitch DS, make contact I oi relay DS-A, resistor 26 to bus bar B2through the coil of relay R to ground. Relay R being the starting relayfor transmitter T, the same recording operation takes place as describedabove. However, relay U is operated directly instead of by relay X andrelay J3 is not energized after the fourth step of transmitter T becausecontact I of relay X is open. Relay J3 will be energized after the iifthstep of transmitter T when direct connection is made for the left handwinding of J3 through the fifth or seventeenth contacts of the third andfourth banks and the associated Wipers of transmitter T in series tobattery. The result is that the indication on will be brought inprinting position on the third typewheel instead of off When selector Treaches position l0 or 22l respectively, a circuit is closed fromground, through back contact 3 of relay X conductor 305, bank contacts Ior 22 of the fourth and third bank of transmitter T in series overconductor 401, wiper and contact I of the second bank of loop selectorLS, wiper and second contact of the second bank of selector SS,conductor 309 to the lower terminal of the coil of relay 13S- A. Twohalves of this coil are now connected in multiple in such a way that thetwo fields set up by them oppose one another causing the relay torelease its armature and interrupting the starting circuit for relay Rfor opening make contact I of relay DS-A. The remainder of the restoringoperation is the same as described above.

In case of an emergency or armed guard signal, relay AL is energized andlocks in giving a continuous audible and visible alarm which can only besilenced by the operator by his acknowledgment key ACK shown in Fig. 5.A circuit is closed from battery through key ACK, resistor 40 and thecoil of relay 0 to ground thereby energizing this relay and locking itin throughits make contact I which bridges the key ACK. Back contact Iof relay 0 breaks and causes relay AL to release silencing the alarmbell 50 and extinguishing the special signal lamp 40. At the same time,a starting circuit for relay R is closed from battery through contact ofrelay C, contact I of relay AP, bus bar B5, contact 2 of relay 0,conductor 4I2, resistor 42, back contact 5 of A, back contact 4 of relayC and the coil of relay R to ground. Selector SS has no part in therecording of this signal but conductor 4I2 is also connected to the 25thbank contact of the rst bank of loop selector LS and relays R, A, C andU operate in sequence as explained above for station signals. As soon asrelay U energizes, relays JI, 3 and 5 pull up as the corresponding bankcontacts of the third, fifth and sixth bank of loop selector LS areconnected to bus BL. Relay J2 is energized after the eighth step ofselector T, determined by the connection to the corresponding bankcontact of bank 4 of selector LS. This brings the line of typesupervisors acknowledgment into printing position, nothing being printedin the other columns. In the tenth or twenty-second position of selectorT, a shunt is -applied to the coil of relay 0 through a circuitextending from ground through back contact 3 of relay X, conductor 305,the tenth or twenty-second bank contacts and Wipers of the fourth andthird banks of selector T, conductor 401, the second wiper and bank ofloop selector LS in position 25, conductor 3I0, the lower terminal oithe coil of relay 0 and ground. Relay 0 is thereby caused to beenergized thereby restoring it to normal condition.

From the above description of the complete watchmens report system it isevident that this invention provides a complete circuit and recordingmeans for supervising a plurality of watchmens tour loops. In additionto the usual report boxes, there is provided special signal boxes suchas arm guard call boxes for the purpose of summoning help in case ofholdups or the like. The system further provides a means whereby thewatchman may send an emergency signal for the purpose of indicating anemergency condition on his tour. 'Ihe system is also provided withdelinquency and sequence control switches whereby the system may beoperated in such a manner given sequenceor the sequence switch may bethrown to allow the watchman to operate the boxes in any order which hedesires.

It is also evident from the above description that a recording circuitis provided which is common to a plurality of watchmens tour circuits orloops and which records ordinary report signals in non-interfering andsuccessive fashion, emergency and arm guard calls signals, operation ofthe delinquency indicator alarm and operation of the sequence switchesor acknowledgment keys. The recording means also records I thetransmitted signals or reports successively that the watchman mustoperate his boxes in a in the order in which they are received andwithout interference between signals.

Further modifications of this invention within the scope of the appendedclaims will be vapparent to those skilled in the art.

What is claimed is:

l. In a signaling system, at least two loop circuits, each loopincluding a plurality of coded impulse transmitters each arranged tosend both normal and emergency signal code groups, the normal codes ofthe transmitters on the same loop circuit being different from eachother, station indicators individual to each loop circuit for storingtransmitted signals, means for operating said station indicators onlywhen the associated impulse transmitters are operated to transmit normalsignal codes in the proper sequence, a common recorder for all of saidloop circuits and means for operating said recorder to record signalsstored in said station indicators and to record emergency signals sentat any time from any of said impulse transmitters.

2. In a signaling system, at least two loop circuits, each including aplurality of coded impulse transmitters arranged in a predeterminedorder, said transmitters being arranged to transmit predetermined signalcode groups when operated, station indicators individual to each loopcircuit `for storing transmitted signals from said transmitters, meansfor operating said station indicators only when the associated impulsetransmitters are operated in the proper sequence, a recorder, means foroperating said recorder to record signals stored in all of said stationindicators, an alarm and means to operate said alarm when transmittersare not operated in the proper sequence.

3. In combination, a signal transmitting station for transmitting a codeand an emergency' signal, -a station selector responsive to said signaltransmitter for temporarily storing said signals, a normal relayresponsive to said station selector, an emergency relay, a stationindicator responsive to said station selector for permanentlyregistering said code, a timing relay responsive to said emergencysignal for controlling said emergency relay, an impulse counting relayresponsive to the timing relay for counting the emergency signal and therst impulse of the code and an auxiliary timing relay for timing theoperation of the station selector.

4. In combination, a loop circuit including a plurality of watchmenstour transmitting stations, a coded impulse transmitter at each stationfor transmitting at least two distinctive types of signals havingdifferent time characteristics, timing means for distinguishing betweensaid distinctive types of signals, means for registering signals fromsaid transmitting station, recording means for recording saiddistinctive types of signals and means for establishing a connectionfrom the registering means to control the operation-of said recordingmeans in accordance with the number of the transmitting stationand thetype of signal. L

5'. A signaling system comprising a coded impulse transmitter fortransmitting a single digit box code and an emergency signal and arepeater connected to said transmitter for repeating said signalscomprising an input, a normal output circuit and an emergency outputcircuit, a relay connected to said input fordistinguishing between Ysaidbox codeV and said emergency code and forV partially completing saidemergency output circuit upon the occurrence of said emergency signal,and means responsive to said box code signal for completing the circuitAto both outputs whereby all box code signals are repeated to the normaloutput.

6. In a signaling system, a loop circuit including a plurality oftransmitting stations, some of said stations having means thereat fortransmitting'a single digit box code plus identification impulses havinga time characteristic for signifying one type of signal and otherstations having means thereat for transmitting a single digit box codeplus identication impulses having a different time characteristic forsignifying another type of signal, timing means responsive to thetransmitted signals for repeating the box code and distinguishingbetween the identification impulses and recording means for making 'apermanent record of the box numbers as they are transmitted and theidentifying description of the type of signal transmitted.

7. In a signaling system, a plurality of loop circuits, each loopincluding a plurality of transmitting stations, each station comprisinga coded impulse transmitter for transmitting a box code plusidentication impulses, means associated with each loop circuit andresponsive to transmitted signals for repeating the code anddistinguishing between different types of signals in accordance withsaid identification impulses, storage means individual to each loop forstoring said repeated code, a recording means for recording the box codeand indicating the type of signal and means for selecting the storagemeans when it is actuated and connecting the recorder thereto.

8. In a signaling system, a transmitting station for transmitting asingle digit watch report code signal or an emergency code signal, arepeater connected thereto, a printer for recording signals transmittedfrom said transmitting station, a printing relay responsive to the coderepeated by said repeater for controlling said i;

printer, an emergency printing relay responsive to emergency signals forsetting up a control circuit for controlling the printer to print anemergency call signal and a cut off relay responsive to said emergencysignal for disabling the control circuit set up by said printing relaywhereby normal watch report signals are prevented from interfering withthe recording of emergency signals.

9. In a signaling system, a plurality of loop circuits, each loopincluding a plurality of transmitting stations, each station comprisinga coded impulse transmitter for transmitting a supervisory code signal,a, printer common to said loop circuits for recording code signals inresponse to operation of said transmitters, a loop selector common tosaid loops for connecting said printer to the various loops, a printingrelay individual to each loop and responsive to the codey forcontrolling the printer and means responsive to said printing relay forstarting and stopping saidA loop selector at the beginning and endV ofeach code whereby signals from individual loops are recorded innon-interfering and successive order. 10. In a watchmans tour system, awatchmans loop circuit including a plurality of coded impulsetransmitters, each transmitter having a number of teeth corresponding tothe number of the station plus two prefix transmitting teeth fornormally transmitting a watch report signal or an emergency signal whena prefix impulse is transmitted, means comprising a repeating relayresponsive to all signal impulses from said transmitters, meanscomprising a station selector switch responsive to said relay fortemporarily registering the number of the reporting transmitter asrepeated by said relay, means comprising a station indicator responsiveto said station selector for permanently registering predeterminednumber of the reporting stations and checking the sequence oftransmitter operation, means comprising a recording relay responsive tooperation of a transmitter which has been operated in its propersequence, an emergency recording relay, means for identifying the prefixcharacter to be printed which signifies the type of Vsignal received andcontrolling said emergency recording relay if an emergency signal isreceived comprising a timing relay for timing the interval between thefirst and second impulses, means comprisingY a printing recorder forprinting watch report signals and emergency call signals in response tooperation of said recording relay or said emergency recording relay andmeans responsive to said recording relay for establishing a connectionfrom said station indicator to said printing recorder whereby the typeof signal and the station number are recorded.

l1. In a watchmans tour system, a plurality of watchmens loop circuits,each loop circuit including a plurality of coded impulse transmitters,each transmitter having a number of teeth corresponding to the numberofthe station plus two prex transmitting teeth, means for repeating allsignal impulses from said transmitters, means responsive to saidrepeating means for temporarily registering the number of the reportingtransmitter, means responsive to said registering means for permanentlyregistering the number of the reporting station and checking thesequence of transmitter operation, a printing means for printing alltypes of signals, a printer control means responsive to operation of atransmitter which has been operated in its proper sequence forcontrolling said printing means, an emergency printer control means,means for selecting the prefix character to be printed which signifiesthe type of signal received and controlling the printing and emergencyprinting control means andV a loop selecting means responsive to saidprinting control means for establishing a connection from said permanentregistering means to said printing means whereby the printing means canrecord the designation of the type of signal and the station number.

12. In a watchmans tour system, a watchmans loop circuit including aplurality of coded impulse transmitters therein, a repeating relayresponsive to all signal impulses from said transmitters, a stationselector responsive to said relay for registering the number of thereporting transmitter, a plurality of code bus bars, means forenergizing'certain bus bars in accordance with the number of thesignaling station, a printing ganarse recorder for printing the numberof the signaling station, a recording relay responsive to the repeatingrelay for controlling said printing recorder. and a station indicatorresponsive to said station selector for connecting selected code busbars to said recording relay whereby said printing recorder is energizedto print the designation of the type of signal and the number of thesignaling transmitter.

13. In a watchmans tour system, a watchmans loop circuit including aplurality of transmitting stations, each station being adapted totransmit a -box code andan emergency preiix signal, a repeating relayconnected to said loop for repeating all signals, a station selecterresponsive to said repeating relay for temporarily `storing saidsignals, a Watch report relay responsive to said station selector, anemergency relay, a station indicator responsive to said station selectorfor permanently registering said box code, a prefix timing relayresponsive to the space after the emergency prefix for controlling theemergency relay, an impulse counting relay responsive to the prefixtiming relay for counting the emergency preiix and the first impulse ofthe box code and an auxiliary timing relay for timing the box code andthe operation of the station selector.

14. In a watchmans tour system, a watchmans transmitting station adaptedto transmit a box code and an emergency prefix signal, a repeating relayfor repeating all signals from said transmitting station, a stationselector for storing signals repeated by said repeating relay, a watchreport relay controlled by said station selector, an emergency relay, astation indicator for registering said box code, a timing relay forcontrolling said emergency relay, an impulse counting relay responsiveto said timing relay for counting the emergency prex and the firstimpulse of the box code and an auxiliary timing relay for timing the boxcode and terminating the operation of the station selector.

15. In a watchmans tour system, a watchmans loop circuit including atransmitting station adapted to transmit a box code and an emergencyprex signal, a station selector for temporarily storing all signals, anormal relay controlled by said station selector, an emergency relay, astation indicator responsive to said station selector for permanentlyregistering said box code, means for timing all signals from saidtransmitting stations to distinguish normal code signals from emergencysignals and to control said normal relay or said emergency relay inaccordance with the received signal and means for timing the box codeand terminating the operation of said station selector.

16. In a watchmans tour system, a plurality of loop circuits eachincluding a plurality of wathmens tour transmitting stations, a codedimpulse transmitter at each station for transmitting at least twodistinctive types of signals, means individual to each of said loopcircuits for distinguishing between said distinctive types of signals,station indicators individual to said loop circuits for registeringsignals from said transmitting stations, delinquency indicatorsresponsive to said station indicators, a recorder controlled by saiddistinguishing means and common to said loop circuits for recording saiddistinctive types of signals or a delinquency signal and a selectorcommon to said loop circuits for establishing a connection from thestation indicators to control the operation of said recorder inaccordance with the number of the transmitting station.

17. In a watchmans tour system, a loop circuit including 'a watchmanstour transmitting station, a coded impulse transmitter for transmittingat least two distinctive types of signals, means individual to said loopcircuit for distinguishing between said distinctive types of signals, astation indicator individual to said loop circuit for registeringsignals from said transmitting station, a recorder responsive to saiddistinguishing means and connected to said loop circuit for recordingsaid distinctive types of signals and a selector connected to said loopcircuit for establis'hing a connection from the active station indicatorto control the operation of said recorder in accordance With the numberof the transmitting station.

18. A signaling system comprising a coded impulse transmitter fortransmitting a single digit box code consisting of marking and spacingsignals and a second signal consisting of the same single digit box codeand a prefix signal comprising a marking impulse of normal lengthiollowed by a spacing signal of greater than normal length and arepeater connected to said transmitter for repeating said signalscomprising an y input, a normal output circuit and an emergency output,a relay connected to said input for repeating all signals, a prefixspace timing relay responsive to the repeating relay for registering therst marking impulse and timing the space signal thereafter to partiallyprepare a circuit to the emergency output upon the occurrence of aspacing impulse of greater than normal length, a iirst auxiliarycounting relay for registering the rst spacing signal and preparing acircuit to both outputs, and a second auxiliary relay for registeringthe second marking impulse and completing the circuit to the outputswhereby all subsequent box code signals are repeated to the normaloutput.

19. In a watchmans tour system, a watchmans loop circuit including awatch report station therein comprising a coded impulse transmitterv fortransmitting a single digit box code, the irst round consisting ofmarking signals equal to the number of the box plus a normal prefix andthe second round consisting of the same single digit box code plus anadditionad prefix separated from the normal prex by an abnormally longspace, a repeater connected to said loop comprising timing and impulsecounting relays for deleting said prexes and repeating the box numbers,a station selector energized through circuits established by said relaysfor temporarily registering the box numbers, a station indicatorenergized by said relays and said station selector for permanentlyregistering said box numbers, an armed guard transmitter in said loopcircuit having the same type of code as said other station and adaptedto transmit both prex signals on the iirst round plus sufficient codeimpulses to step said station indicator to a special position, arecording relay energized through a circuit established by saidauxiliary relays, said station selector and said station indicator, anemergency relay energized by said prex space timing relay, and saidauxiliary relays and a recorder responsive to said recording oremergency relays and said station indicator for recording either a Watchreport, an emergency or an armed guard signal and the box number.

20. In a watchmans tour system, a watchmans loop circuit including aplurality of watch report stations therein each of said stationscomprising a coded impulse transmitter for transmitting a single digitbox code, the first round consisting of marking signals equal to thenumber of the box plus a normal prex and the second round consisting ofthe same single digit box code plus an additional prex separated fromthe normal prex by an abnormally long space, means connected to saidloop circuit for deleting the prex signals, distinguishing the type ofsignal transmitted and repeating the box number, means for recording thestation numbers in accordance with the numbers transmitted from saidloop circuit and means for recording the type of signal in accordanceWith the time relation existing be.

tween the prefix impulses and the box number impulses.

21. In a watchmans tour system, a Watchmans loop circuit including aplurality of Vcoded impulse transmitting tour boxes therein and at leastone coded impulse transmitting armed guard box, a repeating relayresponsive to al1 signal impulses from said boxes, a selector responsiveto said relay for registering the number of the reporting boxes, aplurality of code bus bars, a printing recorder for printing the numberof the signaling box, a recording relay for controlling the saidprinting recorder and a station indicator responsive to said selectorfor connecting certain code bus bars to said recorder and for energizingsaid recording relay whereby said printing recorder is energized toprint the designation of the type of signal and the number of thesignaling box.

MANFRED W. MUEHTER.

